Merge pull request #71364 from clayjohn/exposure-builtin

Add EXPOSURE built in to spatial shaders

drivers/gles3/storage/material_storage.cpp

@@ -1603,6 +1603,7 @@ MaterialStorage::MaterialStorage() {
 		//builtins
 
 		actions.renames["TIME"] = "scene_data.time";
+		actions.renames["EXPOSURE"] = "(1.0 / scene_data.emissive_exposure_normalization)";
 		actions.renames["PI"] = _MKSTR(Math_PI);
 		actions.renames["TAU"] = _MKSTR(Math_TAU);
 		actions.renames["E"] = _MKSTR(Math_E);

editor/plugins/visual_shader_editor_plugin.cpp

@@ -5516,6 +5516,7 @@ VisualShaderEditor::VisualShaderEditor() {
 
 	// NODE3D-FOR-ALL
 
+	add_options.push_back(AddOption("Exposure", "Input/All", "VisualShaderNodeInput", vformat(input_param_shader_modes, "exposure", "EXPOSURE"), { "exposure" }, VisualShaderNode::PORT_TYPE_SCALAR, -1, Shader::MODE_SPATIAL));
 	add_options.push_back(AddOption("InvProjectionMatrix", "Input/All", "VisualShaderNodeInput", vformat(input_param_shader_modes, "inv_projection_matrix", "INV_PROJECTION_MATRIX"), { "inv_projection_matrix" }, VisualShaderNode::PORT_TYPE_TRANSFORM, -1, Shader::MODE_SPATIAL));
 	add_options.push_back(AddOption("InvViewMatrix", "Input/All", "VisualShaderNodeInput", vformat(input_param_shader_modes, "inv_view_matrix", "INV_VIEW_MATRIX"), { "inv_view_matrix" }, VisualShaderNode::PORT_TYPE_TRANSFORM, -1, Shader::MODE_SPATIAL));
 	add_options.push_back(AddOption("ModelMatrix", "Input/All", "VisualShaderNodeInput", vformat(input_param_shader_modes, "model_matrix", "MODEL_MATRIX"), { "model_matrix" }, VisualShaderNode::PORT_TYPE_TRANSFORM, -1, Shader::MODE_SPATIAL));

scene/resources/material.cpp

@@ -1286,7 +1286,7 @@ void BaseMaterial3D::_update_shader() {
 			code += "	vec2 ref_ofs = SCREEN_UV - ref_normal.xy * dot(texture(texture_refraction,base_uv),refraction_texture_channel) * refraction;\n";
 		}
 		code += "	float ref_amount = 1.0 - albedo.a * albedo_tex.a;\n";
-		code += "	EMISSION += textureLod(screen_texture,ref_ofs,ROUGHNESS * 8.0).rgb * ref_amount;\n";
+		code += "	EMISSION += textureLod(screen_texture,ref_ofs,ROUGHNESS * 8.0).rgb * ref_amount * EXPOSURE;\n";
 		code += "	ALBEDO *= 1.0 - ref_amount;\n";
 		code += "	ALPHA = 1.0;\n";
 

scene/resources/visual_shader.cpp

@@ -2714,6 +2714,7 @@ const VisualShaderNodeInput::Port VisualShaderNodeInput::ports[] = {
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_VERTEX, VisualShaderNode::PORT_TYPE_TRANSFORM, "projection_matrix", "PROJECTION_MATRIX" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_VERTEX, VisualShaderNode::PORT_TYPE_TRANSFORM, "inv_projection_matrix", "INV_PROJECTION_MATRIX" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_VERTEX, VisualShaderNode::PORT_TYPE_SCALAR, "time", "TIME" },
+	{ Shader::MODE_SPATIAL, VisualShader::TYPE_VERTEX, VisualShaderNode::PORT_TYPE_SCALAR, "exposure", "EXPOSURE" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_VERTEX, VisualShaderNode::PORT_TYPE_VECTOR_2D, "viewport_size", "VIEWPORT_SIZE" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_VERTEX, VisualShaderNode::PORT_TYPE_BOOLEAN, "output_is_srgb", "OUTPUT_IS_SRGB" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_VERTEX, VisualShaderNode::PORT_TYPE_SCALAR_INT, "view_index", "VIEW_INDEX" },
@@ -2748,6 +2749,7 @@ const VisualShaderNodeInput::Port VisualShaderNodeInput::ports[] = {
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_FRAGMENT, VisualShaderNode::PORT_TYPE_TRANSFORM, "projection_matrix", "PROJECTION_MATRIX" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_FRAGMENT, VisualShaderNode::PORT_TYPE_TRANSFORM, "inv_projection_matrix", "INV_PROJECTION_MATRIX" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_FRAGMENT, VisualShaderNode::PORT_TYPE_SCALAR, "time", "TIME" },
+	{ Shader::MODE_SPATIAL, VisualShader::TYPE_FRAGMENT, VisualShaderNode::PORT_TYPE_SCALAR, "exposure", "EXPOSURE" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_FRAGMENT, VisualShaderNode::PORT_TYPE_VECTOR_2D, "viewport_size", "VIEWPORT_SIZE" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_FRAGMENT, VisualShaderNode::PORT_TYPE_BOOLEAN, "output_is_srgb", "OUTPUT_IS_SRGB" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_FRAGMENT, VisualShaderNode::PORT_TYPE_BOOLEAN, "front_facing", "FRONT_FACING" },
@@ -2782,6 +2784,7 @@ const VisualShaderNodeInput::Port VisualShaderNodeInput::ports[] = {
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_LIGHT, VisualShaderNode::PORT_TYPE_TRANSFORM, "projection_matrix", "PROJECTION_MATRIX" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_LIGHT, VisualShaderNode::PORT_TYPE_TRANSFORM, "inv_projection_matrix", "INV_PROJECTION_MATRIX" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_LIGHT, VisualShaderNode::PORT_TYPE_SCALAR, "time", "TIME" },
+	{ Shader::MODE_SPATIAL, VisualShader::TYPE_LIGHT, VisualShaderNode::PORT_TYPE_SCALAR, "exposure", "EXPOSURE" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_LIGHT, VisualShaderNode::PORT_TYPE_VECTOR_2D, "viewport_size", "VIEWPORT_SIZE" },
 	{ Shader::MODE_SPATIAL, VisualShader::TYPE_LIGHT, VisualShaderNode::PORT_TYPE_BOOLEAN, "output_is_srgb", "OUTPUT_IS_SRGB" },
 

servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp

@@ -584,6 +584,7 @@ void SceneShaderForwardClustered::init(const String p_defines) {
 		//builtins
 
 		actions.renames["TIME"] = "global_time";
+		actions.renames["EXPOSURE"] = "(1.0 / scene_data_block.data.emissive_exposure_normalization)";
 		actions.renames["PI"] = _MKSTR(Math_PI);
 		actions.renames["TAU"] = _MKSTR(Math_TAU);
 		actions.renames["E"] = _MKSTR(Math_E);

servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp

@@ -474,6 +474,7 @@ void SceneShaderForwardMobile::init(const String p_defines) {
 		//builtins
 
 		actions.renames["TIME"] = "scene_data_block.data.time";
+		actions.renames["EXPOSURE"] = "(1.0 / scene_data_block.data.emissive_exposure_normalization)";
 		actions.renames["PI"] = _MKSTR(Math_PI);
 		actions.renames["TAU"] = _MKSTR(Math_TAU);
 		actions.renames["E"] = _MKSTR(Math_E);

servers/rendering/shader_types.cpp

@@ -59,6 +59,7 @@ ShaderTypes::ShaderTypes() {
 	/*************** SPATIAL ***********************/
 
 	shader_modes[RS::SHADER_SPATIAL].functions["global"].built_ins["TIME"] = constt(ShaderLanguage::TYPE_FLOAT);
+	shader_modes[RS::SHADER_SPATIAL].functions["global"].built_ins["EXPOSURE"] = constt(ShaderLanguage::TYPE_FLOAT);
 	shader_modes[RS::SHADER_SPATIAL].functions["constants"].built_ins["PI"] = constt(ShaderLanguage::TYPE_FLOAT);
 	shader_modes[RS::SHADER_SPATIAL].functions["constants"].built_ins["TAU"] = constt(ShaderLanguage::TYPE_FLOAT);
 	shader_modes[RS::SHADER_SPATIAL].functions["constants"].built_ins["E"] = constt(ShaderLanguage::TYPE_FLOAT);